Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-27827

A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets can cause memory to be lost when allocating data to handle specific optional TLVs, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.

Published

2021-03-18T17:15:13.510

Last Modified

2025-12-03T19:15:51.763

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

6.9

Weaknesses

Type: Secondary
CWE-400

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	lldpd_project	lldpd	< 1.0.8	Yes
Application	openvswitch	openvswitch	< 2.6.9	Yes
Application	openvswitch	openvswitch	< 2.7.12	Yes
Application	openvswitch	openvswitch	< 2.8.10	Yes
Application	openvswitch	openvswitch	< 2.9.8	Yes
Application	openvswitch	openvswitch	< 2.10.6	Yes
Application	openvswitch	openvswitch	< 2.11.5	Yes
Application	openvswitch	openvswitch	< 2.12.2	Yes
Application	openvswitch	openvswitch	< 2.13.2	Yes
Application	openvswitch	openvswitch	< 2.14.1	Yes
Application	redhat	openshift_container_platform	4.0	Yes
Application	redhat	openstack	10	Yes
Application	redhat	openstack	13	Yes
Application	redhat	virtualization	4.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	fedoraproject	fedora	33	Yes
Operating System	siemens	simatic_hmi_unified_comfort_panels_firmware	< 17	Yes
Hardware	siemens	simatic_hmi_unified_comfort_panels	-	No
Operating System	siemens	simatic_net_cp_1243-1_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1243-1	-	No
Operating System	siemens	simatic_net_cp_1243-8_irc_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1243-8_irc	-	No
Operating System	siemens	simatic_net_cp_1542sp-1_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1542sp-1	-	No
Operating System	siemens	simatic_net_cp_1542sp-1_irc_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1542sp-1_irc	-	No
Operating System	siemens	simatic_net_cp_1543-1_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1543-1	-	No
Operating System	siemens	simatic_net_cp_1543sp-1_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1543sp-1	-	No
Operating System	siemens	simatic_net_cp_1545-1_firmware	-	Yes
Hardware	siemens	simatic_net_cp_1545-1	-	No
Operating System	siemens	tim_1531_irc_firmware	< 2.2	Yes
Hardware	siemens	tim_1531_irc	-	No
Operating System	siemens	sinumerik_one_firmware	< 2.0.1	Yes
Hardware	siemens	sinumerik_one	-	No

References

https://bugzilla.redhat.com/show_bug.cgi?id=1921438 Issue Tracking, Mitigation, Patch, Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf Patch, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/ ([email protected])
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html Mailing List, Mitigation, Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/202311-16 ([email protected])
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 Third Party Advisory, US Government Resource ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1921438 Issue Tracking, Mitigation, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/ (af854a3a-2127-422b-91ae-364da2661108)
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html Mailing List, Mitigation, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202311-16 (af854a3a-2127-422b-91ae-364da2661108)
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)